Improvement in filters



which the ltering material is placed.

UNITED STATES PATENT OFFICE.,

CHARLES OLEMINSHAW, OF TROY, NEW YORK.

IMPROVEMENT IN FILTERS.

Specification forming part of Letters Patent No. 46.079, dated January 31, 1865.

To a/ZZ whom it may concern/.-

Be it known that I, C. GLEMINSHAW, of Troy, in the county of Rensselaer and State of New York, have invented a new anduseful Improvement in Filtering Cider; and I do hereby declare that the following is a i'ull, clear, and exact description thereof, which will enable others skilled in the art to make and yuse the same, reference being had to the accompanying drawings, forming part ot' this specification, in which- Figure 1 is a vertical central section of my invention; Fig. 2, a plan or top view of the same.

Similar letters of reference indicate like parts.

The usual plan consists simply in pouring the cider into a vessel having the filtering material at its bottom, the cider passing slowly through the iilterin g material by gravity only. The upper part of the filtering medium soon becomes foul and choked up, and requires to be removed, involving` an outlay ot' time and causing a Waste of the'iiltering Vmateria-l, a large amount of good being thrown aw'ay with tlte foul portion. My invention fully obviates this ditliculty.

In carrying out my invention I employ a close vessel, A, of either wood or metal, in The bottom of this vessel is perforated with holes a, and over the holes a a screen or canvas, b, secured to a hoop or ring, c, is tted, the latter being packed ti ghtlyin A. (See Fig. l.) Over this screen or canvas the sand or iiltering medium B is placed and O is a pipe provided with a faucet, which communicates with the upper part of the vessel A, and leads from a forcepump or other device capable of forcing the cider through the filtering medium. An ordinary force-pump may be employed for this purpose, and it will be seen at once that by this means the tilterin g process may be very rapidly performed, and the whole mass of iiltering material in the vessel A rendered available in performing the desired work, owing tothe pressure exerted upon the cider, tor when the upper mass or layer of the filtering material becomes foul the cider will be forced through it to a clean layer below, and so on until the whole mass of filtering material becomes foul, whereas when gravity alone is depended upon for the passage ofthe cider through the iiltering medium the operation ot' iiltering soon becsmes checked on account ot" the upper layer or part of the medium becoming foul, and the latter requires either to be removed entirely or have its upper surface taken away, and this is attended with a waste of time, and also ot' iiltering material, as a por tion of good is invariably removed with the foul portion of the same.'

By my improvement also the cidervis not injured by exposure tothe air, as is the case when the open filter is used.

While disclaiming the general idea oi ltering by means of a forced current, I claim as new and desire to secure by Letters Patent- The combination of the packing-ring c with the close vessel A, iiltering medium B, pipe C, screen b, and pert'orations co a, arranged and operating as and for the purposes specied.

GHAS. GLEMINSHAW.

Witnesses:

H. A. SHERwooD, LUTHER POMEROY. 

